Electric-arc light



(No Model.)

G. M. LANE.

ELECTRIC ARC LIGHT.

No. 350,140. Patented-Oct. 5, 1886.

Illlllnn lin IiillllllllllllllllIllllllllll 1 III IIIIIIIIIIIIII IIIQvdw case 0 814 0011 o a UNITED STATES PATENT OFFICE.

ELECTRIC- SPECIFICATION forming part of Letters Application filed March31, 1356.

To a. whom, it may concern:

Be it known that'l, (lnonunM. LANE, acitizen of the United States,residing at Asbury Park, in the county of Monmouth and State of NewJersey, have invented certain new and useful In'iprovements inElectric-Arc Lamps; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appcrtains to make and use the same,reference being had to the accompanying draw ings, and to the lettersand figures of reference marked thereon, which form. a part of thisspecification.

My invention relates to are lamps of that class in which either curvedor arc-shaped points or straight points are employed; and it has for itsobject to provide a simple, cheap, and positive means forliolding suchpoints and feeding them in such manner that the voltaic arc shallmaintain a nearly fixed position relat-ive to the parts of the lamp, afurther object being to reduce the lamp to a compact form, and yetmaintain the greatest possible length of points.

It consists in the novel features more fully hereinafter set forth,claimed, and shown in the annexed drawings, in which- Figure 1 is a sideView of a lamp of my construction complete and ready for use. Fig. 2 isa similar view on an enlarged scale with the casing and globe removed.Fig. 3 is an end view; Fig. i, an enlarged detail view of the pawl andthe fecdingwhecl. Fig. 5 is a detail. view of the means fordisconnecting the segments when adjusting the carbons, and Fig. 6 is amodification.

The case A may be of any commonly used in this class of articles, and incloses the operating parts of thelamp. Hood or shield 13-, dependingfrom. the under side of the casing, may be used as a reflector, and atthe same time serve as support for the globe (I. By supporting the globefrom above and having all the operating parts as well as thecarbon-holders located above the are, all pos sibility for the castingof deep shadows, as is usual with lamps of ordinary construction, is

suitable shape entirely obviated.

\Vithin case A? is located the electromagnets 1) T), the latter being ofa high resist- ARC LiGHT.

Patent No. 350,140, dated October 5, 188

Serial No. 197,339.

(No model.)

ance compared with the former. These mag nets are arranged at oppositesides of the case, and between them is pivoted a lever, E, pro- \idcdwith armalures c cateach end, respectively. iracket F, depending fromthclevei-E, has adjustably connected therewith a pawl, G, which worksthrough a guide in the bottom of the case, for a purpose presently madeapparout. Supports H H, depending from the case A, are provided withshortshafts or arms 71. It near their lower ends, respectively, whichare in axial line and terminate at a short distance from each other.Mutilated or segment gears I I are journaled on said shafts or arms,respectively, and are provided with carboir holders 2' i, respectively.These holders may projectfrom the plane ofthe segments toward eachother, so as to be nearly in the same plane to permit the entireconsumption, or nearly so, of the points; but for practical purposes theholders may be in the same plane with the re spective segments, whichare arranged in close relationship to each other. Pinions J J aremounted on shaftsjj, journaled between the upper ends of the supports orbrackets H The shafts are at unequal distances from the axis of thesegments, thus permittingtl'ie pinions to be of unequal sizes, so thatthe points 1" I" may be fed at different rates of speed to compensatefor the greater consumption of the positive point and maintain a fixedposition of the arc. The pinion J meshes with a pinion, J, on the shaftj, and imparts motion thereto. On said shaftj is likewise mounted atoothed disk or gear-wheel, J, which is engaged and has its movementscontrolled by the pawl G. The shafts j j will be suitably insulated fromthe supports, and in each case the insulation will be at one end only,and to prevent short-circuiting the lamp the pinion J" will be insulatedfrom its shaft.

In practice the current from the line-wire enters at L, thence throughsupport H, shaft h, segment 1, points I 1, segment I, shaft 7!, supportll, leaving at L, where it again joins the line. The current in itspassage likewise passes through the magnets D D, which are in cluded in.the circuit, and vibrates the lever E in the usual manner. 'When thecurrent first passes, the magnet l is energized, which, at tracting thearmature c, elevates the opposite one, a, which carries with it the pawlG. The latter, engaging a tooth of disk J rotates the segments inopposite directions, as indicated by the arrow. This separates thepoints and establishes the arc in a manner well understood. As theresistance increases, the energy of magnet Dpredominates, whence itattracts the armature c, effecting a disengagement of the pawl from thedisk J The points, being freed, gravitate toward one another till heldin check by the predominant energy of magnet D. In case the lamp shouldbecome inoperative and the points refuse to feed, and inorder that thesystem may not be impaired thereby, a shunt, M, located in the case A,affords a passage for the current through the lever E and contacts m mto the line, thus cutting the lamp out of circuit. To prevent the toogreat feed of the points at the moment the pawl G is disengaged from thedisk J, a supplementary pawl, g, is provided and pivoted to the pawl Gto engage a tooth of said disk. The shaft j is so arranged that thepinion J may be thrown out of engagement, so that either carbon-holdermay be moved without disturbing the other, when desired, as shown inFig. 5. The segment-levers I I have projections A A on the sidesfarthest from the carbon-holders.

These projections are arranged to engage pins B B on the supports H H,forming a short circuit, so that the lamp will be automatically cut outbefore the carbons are entirely consumed, thus saving the carbon-holdersfrom being destroyed.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is-

reciprocating pawl for actuating said gearing, and a supplementary pawlcarried by said reciprocating pawl to limit and hold in check themovement of said gearing, substantially as and for the purpose setforth.

3. In an arc lamp, the combination of the supports H H, provided withprojections B B, shafts h h in axial line, segments I 1, provided withholders 1) t" and projections A A, shafts j j at diflerentdistances'from the pe- J J J toothed disk J, keyed to one of saidshafts, and the reciprocating pawl G, provided with the supplementarypawl g, substantially as and for the purposes set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE M. LANE.

\Vitnesses:

JOHN ROOKAFELLER,

D. B. FARRING TON.

ments and moving them at different rates, the

ripheries of the segments, differential gearing-

